void AssertIntervalEqualTo(
DateTime basePoint, DateTime target,
int years = 0, int months = 0, int days = 0, int hours = 0, int minutes = 0, int seconds = 0,
int milliseconds = 0, bool negative = false
)
{
CalendarTimeSpan diff = TimeComparison.CalendarDifference(basePoint, target);
Assert.Equal(
new CalendarTimeSpan(years, months, days, hours, minutes, seconds, milliseconds, negative),
diff
);
}
